[gitmo/Mouse.git] / lib / Mouse / PurePerl.pm

package Mouse::PurePerl;

require Mouse::Util;

package
    Mouse::Util;

use strict;
use warnings;

use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl

use B ();

sub is_class_loaded {
    my $class = shift;

    return 0 if ref($class) || !defined($class) || !length($class);

    # walk the symbol table tree to avoid autovififying
    # \*{${main::}{"Foo::"}} == \*main::Foo::

    my $pack = \%::;
    foreach my $part (split('::', $class)) {
        my $entry = \$pack->{$part . '::'};
        return 0 if ref($entry) ne 'GLOB';
        $pack = *{$entry}{HASH} or return 0;
    }

    # check for $VERSION or @ISA
    return 1 if exists $pack->{VERSION}
             && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
    return 1 if exists $pack->{ISA}
             && defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;

    # check for any method
    foreach my $name( keys %{$pack} ) {
        my $entry = \$pack->{$name};
        return 1 if ref($entry) ne 'GLOB' || defined *{$entry}{CODE};
    }

    # fail
    return 0;
}


# taken from Sub::Identify
sub get_code_info {
    my ($coderef) = @_;
    ref($coderef) or return;

    my $cv = B::svref_2object($coderef);
    $cv->isa('B::CV') or return;

    my $gv = $cv->GV;
    $gv->isa('B::GV') or return;

    return ($gv->STASH->NAME, $gv->NAME);
}

sub get_code_package{
    my($coderef) = @_;

    my $cv = B::svref_2object($coderef);
    $cv->isa('B::CV') or return '';

    my $gv = $cv->GV;
    $gv->isa('B::GV') or return '';

    return $gv->STASH->NAME;
}

sub get_code_ref{
    my($package, $name) = @_;
    no strict 'refs';
    no warnings 'once';
    use warnings FATAL => 'uninitialized';
    return *{$package . '::' . $name}{CODE};
}

sub generate_isa_predicate_for {
    my($for_class, $name) = @_;

    my $predicate = sub{ Scalar::Util::blessed($_[0]) && $_[0]->isa($for_class) };

    if(defined $name){
        no strict 'refs';
        *{ caller() . '::' . $name } = $predicate;
        return;
    }

    return $predicate;
}


package
    Mouse::Util::TypeConstraints;

use Scalar::Util qw(blessed looks_like_number openhandle);

sub Any        { 1 }
sub Item       { 1 }

sub Bool       { $_[0] ? $_[0] eq '1' : 1 }
sub Undef      { !defined($_[0]) }
sub Defined    {  defined($_[0])  }
sub Value      {  defined($_[0]) && !ref($_[0]) }
sub Num        { !ref($_[0]) && looks_like_number($_[0]) }
sub Int        {  defined($_[0]) && !ref($_[0]) && $_[0] =~ /^-?[0-9]+$/ }
sub Str        {  defined($_[0]) && !ref($_[0]) }

sub Ref        { ref($_[0]) }
sub ScalarRef  { ref($_[0]) eq 'SCALAR' }
sub ArrayRef   { ref($_[0]) eq 'ARRAY'  }
sub HashRef    { ref($_[0]) eq 'HASH'   }
sub CodeRef    { ref($_[0]) eq 'CODE'   }
sub RegexpRef  { ref($_[0]) eq 'Regexp' }
sub GlobRef    { ref($_[0]) eq 'GLOB'   }

sub FileHandle {
    openhandle($_[0])  || (blessed($_[0]) && $_[0]->isa("IO::Handle"))
}

sub Object     { blessed($_[0]) && blessed($_[0]) ne 'Regexp' }

sub ClassName  { Mouse::Util::is_class_loaded($_[0]) }
sub RoleName   { (Mouse::Util::class_of($_[0]) || return 0)->isa('Mouse::Meta::Role') }

sub _parameterize_ArrayRef_for {
    my($type_parameter) = @_;
    my $check = $type_parameter->_compiled_type_constraint;

    return sub {
        foreach my $value (@{$_}) {
            return undef unless $check->($value);
        }
        return 1;
    }
}

sub _parameterize_HashRef_for {
    my($type_parameter) = @_;
    my $check = $type_parameter->_compiled_type_constraint;

    return sub {
        foreach my $value(values %{$_}){
            return undef unless $check->($value);
        }
        return 1;
    };
}

# 'Maybe' type accepts 'Any', so it requires parameters
sub _parameterize_Maybe_for {
    my($type_parameter) = @_;
    my $check = $type_parameter->_compiled_type_constraint;

    return sub{
        return !defined($_) || $check->($_);
    };
};


package
    Mouse::Meta::Module;

sub name          { $_[0]->{package} }

sub _method_map   { $_[0]->{methods} }
sub _attribute_map{ $_[0]->{attribute_map} }

sub namespace{
    my $name = $_[0]->{package};
    no strict 'refs';
    return \%{ $name . '::' };
}

sub add_method {
    my($self, $name, $code) = @_;

    if(!defined $name){
        $self->throw_error('You must pass a defined name');
    }
    if(!defined $code){
        $self->throw_error('You must pass a defined code');
    }

    if(ref($code) ne 'CODE'){
        $code = \&{$code}; # coerce
    }

    $self->{methods}->{$name} = $code; # Moose stores meta object here.

    my $pkg = $self->name;
    no strict 'refs';
    no warnings 'redefine', 'once';
    *{ $pkg . '::' . $name } = $code;
    return;
}


package
    Mouse::Meta::Class;

sub is_anon_class{
    return exists $_[0]->{anon_serial_id};
}

sub roles { $_[0]->{roles} }

sub linearized_isa { @{ get_linear_isa($_[0]->{package}) } }

sub get_all_attributes {
    my($self) = @_;
    my %attrs = map { %{ $self->initialize($_)->_attribute_map } } reverse $self->linearized_isa;
    return values %attrs;
}

package
    Mouse::Meta::Role;

sub is_anon_role{
    return exists $_[0]->{anon_serial_id};
}

sub get_roles { $_[0]->{roles} }

package
    Mouse::Meta::Attribute;

use Mouse::Meta::Method::Accessor;

# readers

sub name                 { $_[0]->{name}                   }
sub associated_class     { $_[0]->{associated_class}       }

sub accessor             { $_[0]->{accessor}               }
sub reader               { $_[0]->{reader}                 }
sub writer               { $_[0]->{writer}                 }
sub predicate            { $_[0]->{predicate}              }
sub clearer              { $_[0]->{clearer}                }
sub handles              { $_[0]->{handles}                }

sub _is_metadata         { $_[0]->{is}                     }
sub is_required          { $_[0]->{required}               }
sub default              { $_[0]->{default}                }
sub is_lazy              { $_[0]->{lazy}                   }
sub is_lazy_build        { $_[0]->{lazy_build}             }
sub is_weak_ref          { $_[0]->{weak_ref}               }
sub init_arg             { $_[0]->{init_arg}               }
sub type_constraint      { $_[0]->{type_constraint}        }

sub trigger              { $_[0]->{trigger}                }
sub builder              { $_[0]->{builder}                }
sub should_auto_deref    { $_[0]->{auto_deref}             }
sub should_coerce        { $_[0]->{coerce}                 }

sub documentation        { $_[0]->{documentation}          }

# predicates

sub has_accessor         { exists $_[0]->{accessor}        }
sub has_reader           { exists $_[0]->{reader}          }
sub has_writer           { exists $_[0]->{writer}          }
sub has_predicate        { exists $_[0]->{predicate}       }
sub has_clearer          { exists $_[0]->{clearer}         }
sub has_handles          { exists $_[0]->{handles}         }

sub has_default          { exists $_[0]->{default}         }
sub has_type_constraint  { exists $_[0]->{type_constraint} }
sub has_trigger          { exists $_[0]->{trigger}         }
sub has_builder          { exists $_[0]->{builder}         }

sub has_documentation    { exists $_[0]->{documentation}   }

sub accessor_metaclass(){ 'Mouse::Meta::Method::Accessor' }

package
    Mouse::Meta::TypeConstraint;

sub name    { $_[0]->{name}    }
sub parent  { $_[0]->{parent}  }
sub message { $_[0]->{message} }

sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} }

sub _compiled_type_coercion  { $_[0]->{_compiled_type_coercion}  }

sub has_coercion{ exists $_[0]->{_compiled_type_coercion} }


sub compile_type_constraint{
    my($self) = @_;

    # add parents first
    my @checks;
    for(my $parent = $self->{parent}; defined $parent; $parent = $parent->{parent}){
         if($parent->{hand_optimized_type_constraint}){
            unshift @checks, $parent->{hand_optimized_type_constraint};
            last; # a hand optimized constraint must include all the parents
        }
        elsif($parent->{constraint}){
            unshift @checks, $parent->{constraint};
        }
    }

    # then add child
    if($self->{constraint}){
        push @checks, $self->{constraint};
    }

    if($self->{type_constraints}){ # Union
        my @types = map{ $_->{compiled_type_constraint} } @{ $self->{type_constraints} };
        push @checks, sub{
            foreach my $c(@types){
                return 1 if $c->($_[0]);
            }
            return 0;
        };
    }

    if(@checks == 0){
        $self->{compiled_type_constraint} = \&Mouse::Util::TypeConstraints::Any;
    }
    else{
        $self->{compiled_type_constraint} =  sub{
            my(@args) = @_;
            local $_ = $args[0];
            foreach my $c(@checks){
                return undef if !$c->(@args);
            }
            return 1;
        };
    }
    return;
}


1;
__END__

=head1 NAME

Mouse::PurePerl - A Mouse guts in pure Perl

=head1 VERSION

This document describes Mouse version 0.40_05

=head1 SEE ALSO

L<Mouse::XS>

=cut
Commit	Line	Data
ccb38d0b	1	package Mouse::PurePerl;
ccb38d0b	2
a52cca04	3	require Mouse::Util;
a52cca04	4
df6dd016	5	package
	6	Mouse::Util;
	7
	8	use strict;
	9	use warnings;
	10
	11	use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl
	12
	13	use B ();
	14
	15	sub is_class_loaded {
	16	my $class = shift;
	17
	18	return 0 if ref($class) \|\| !defined($class) \|\| !length($class);
	19
	20	# walk the symbol table tree to avoid autovififying
	21	# \{${main::}{"Foo::"}} == \main::Foo::
	22
	23	my $pack = \%::;
	24	foreach my $part (split('::', $class)) {
	25	my $entry = \$pack->{$part . '::'};
	26	return 0 if ref($entry) ne 'GLOB';
	27	$pack = *{$entry}{HASH} or return 0;
	28	}
	29
	30	# check for $VERSION or @ISA
	31	return 1 if exists $pack->{VERSION}
	32	&& defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
	33	return 1 if exists $pack->{ISA}
	34	&& defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;
	35
	36	# check for any method
	37	foreach my $name( keys %{$pack} ) {
	38	my $entry = \$pack->{$name};
	39	return 1 if ref($entry) ne 'GLOB' \|\| defined *{$entry}{CODE};
	40	}
	41
	42	# fail
	43	return 0;
	44	}
	45
	46
	47	# taken from Sub::Identify
	48	sub get_code_info {
	49	my ($coderef) = @_;
	50	ref($coderef) or return;
	51
	52	my $cv = B::svref_2object($coderef);
	53	$cv->isa('B::CV') or return;
	54
	55	my $gv = $cv->GV;
	56	$gv->isa('B::GV') or return;
	57
	58	return ($gv->STASH->NAME, $gv->NAME);
	59	}
	60
	61	sub get_code_package{
	62	my($coderef) = @_;
	63
	64	my $cv = B::svref_2object($coderef);
	65	$cv->isa('B::CV') or return '';
	66
	67	my $gv = $cv->GV;
	68	$gv->isa('B::GV') or return '';
69
70	return $gv->STASH->NAME;
71	}
72
7d96ae4d	73	sub get_code_ref{
	74	my($package, $name) = @_;
	75	no strict 'refs';
	76	no warnings 'once';
	77	use warnings FATAL => 'uninitialized';
	78	return *{$package . '::' . $name}{CODE};
	79	}
	80
e3540312	81	sub generate_isa_predicate_for {
1d5ecd5f	82	my($for_class, $name) = @_;
1d5ecd5f	83
f48920c1	84	my $predicate = sub{ Scalar::Util::blessed($_[0]) && $_[0]->isa($for_class) };
1d5ecd5f	85
	86	if(defined $name){
	87	no strict 'refs';
	88	*{ caller() . '::' . $name } = $predicate;
	89	return;
	90	}
	91
	92	return $predicate;
	93	}
	94
	95
f48920c1	96	package
	97	Mouse::Util::TypeConstraints;
	98
	99	use Scalar::Util qw(blessed looks_like_number openhandle);
	100
7d96ae4d	101	sub Any { 1 }
7d96ae4d	102	sub Item { 1 }
7d96ae4d	103
	104	sub Bool { $_[0] ? $_[0] eq '1' : 1 }
	105	sub Undef { !defined($_[0]) }
	106	sub Defined { defined($_[0]) }
	107	sub Value { defined($_[0]) && !ref($_[0]) }
	108	sub Num { !ref($_[0]) && looks_like_number($_[0]) }
	109	sub Int { defined($_[0]) && !ref($_[0]) && $_[0] =~ /^-?[0-9]+$/ }
	110	sub Str { defined($_[0]) && !ref($_[0]) }
	111
	112	sub Ref { ref($_[0]) }
	113	sub ScalarRef { ref($_[0]) eq 'SCALAR' }
	114	sub ArrayRef { ref($_[0]) eq 'ARRAY' }
	115	sub HashRef { ref($_[0]) eq 'HASH' }
	116	sub CodeRef { ref($_[0]) eq 'CODE' }
	117	sub RegexpRef { ref($_[0]) eq 'Regexp' }
	118	sub GlobRef { ref($_[0]) eq 'GLOB' }
	119
	120	sub FileHandle {
	121	openhandle($_[0]) \|\| (blessed($_[0]) && $_[0]->isa("IO::Handle"))
	122	}
	123
	124	sub Object { blessed($_[0]) && blessed($_[0]) ne 'Regexp' }
	125
	126	sub ClassName { Mouse::Util::is_class_loaded($_[0]) }
	127	sub RoleName { (Mouse::Util::class_of($_[0]) \|\| return 0)->isa('Mouse::Meta::Role') }
	128
619338ac	129	sub _parameterize_ArrayRef_for {
	130	my($type_parameter) = @_;
	131	my $check = $type_parameter->_compiled_type_constraint;
	132
	133	return sub {
	134	foreach my $value (@{$_}) {
	135	return undef unless $check->($value);
	136	}
	137	return 1;
	138	}
	139	}
	140
	141	sub _parameterize_HashRef_for {
	142	my($type_parameter) = @_;
	143	my $check = $type_parameter->_compiled_type_constraint;
	144
	145	return sub {
	146	foreach my $value(values %{$_}){
	147	return undef unless $check->($value);
	148	}
	149	return 1;
	150	};
	151	}
	152
	153	# 'Maybe' type accepts 'Any', so it requires parameters
	154	sub _parameterize_Maybe_for {
	155	my($type_parameter) = @_;
	156	my $check = $type_parameter->_compiled_type_constraint;
	157
	158	return sub{
	159	return !defined($_) \|\| $check->($_);
	160	};
	161	};
	162
	163
7d96ae4d	164
43165725	165	package
	166	Mouse::Meta::Module;
	167
926404f2	168	sub name { $_[0]->{package} }
	169
	170	sub _method_map { $_[0]->{methods} }
	171	sub _attribute_map{ $_[0]->{attribute_map} }
43165725	172
2591e962	173	sub namespace{
	174	my $name = $_[0]->{package};
	175	no strict 'refs';
	176	return \%{ $name . '::' };
	177	}
	178
3e44140b	179	sub add_method {
	180	my($self, $name, $code) = @_;
	181
	182	if(!defined $name){
	183	$self->throw_error('You must pass a defined name');
	184	}
	185	if(!defined $code){
	186	$self->throw_error('You must pass a defined code');
	187	}
	188
	189	if(ref($code) ne 'CODE'){
	190	$code = \&{$code}; # coerce
	191	}
	192
	193	$self->{methods}->{$name} = $code; # Moose stores meta object here.
	194
	195	my $pkg = $self->name;
	196	no strict 'refs';
	197	no warnings 'redefine', 'once';
	198	*{ $pkg . '::' . $name } = $code;
	199	return;
	200	}
	201
	202
43165725	203	package
	204	Mouse::Meta::Class;
	205
	206	sub is_anon_class{
	207	return exists $_[0]->{anon_serial_id};
	208	}
	209
	210	sub roles { $_[0]->{roles} }
	211
cccb83de	212	sub linearized_isa { @{ get_linear_isa($_[0]->{package}) } }
cccb83de	213
da4432f3	214	sub get_all_attributes {
	215	my($self) = @_;
	216	my %attrs = map { %{ $self->initialize($_)->_attribute_map } } reverse $self->linearized_isa;
	217	return values %attrs;
	218	}
	219
43165725	220	package
	221	Mouse::Meta::Role;
	222
	223	sub is_anon_role{
	224	return exists $_[0]->{anon_serial_id};
	225	}
	226
	227	sub get_roles { $_[0]->{roles} }
	228
	229	package
	230	Mouse::Meta::Attribute;
	231
d7d8d49b	232	use Mouse::Meta::Method::Accessor;
43165725	233
	234	# readers
	235
	236	sub name { $_[0]->{name} }
	237	sub associated_class { $_[0]->{associated_class} }
	238
	239	sub accessor { $_[0]->{accessor} }
	240	sub reader { $_[0]->{reader} }
	241	sub writer { $_[0]->{writer} }
	242	sub predicate { $_[0]->{predicate} }
	243	sub clearer { $_[0]->{clearer} }
	244	sub handles { $_[0]->{handles} }
	245
	246	sub _is_metadata { $_[0]->{is} }
	247	sub is_required { $_[0]->{required} }
	248	sub default { $_[0]->{default} }
	249	sub is_lazy { $_[0]->{lazy} }
	250	sub is_lazy_build { $_[0]->{lazy_build} }
	251	sub is_weak_ref { $_[0]->{weak_ref} }
	252	sub init_arg { $_[0]->{init_arg} }
	253	sub type_constraint { $_[0]->{type_constraint} }
	254
	255	sub trigger { $_[0]->{trigger} }
	256	sub builder { $_[0]->{builder} }
	257	sub should_auto_deref { $_[0]->{auto_deref} }
	258	sub should_coerce { $_[0]->{coerce} }
	259
d899d3e7	260	sub documentation { $_[0]->{documentation} }
d899d3e7	261
43165725	262	# predicates
	263
	264	sub has_accessor { exists $_[0]->{accessor} }
	265	sub has_reader { exists $_[0]->{reader} }
	266	sub has_writer { exists $_[0]->{writer} }
	267	sub has_predicate { exists $_[0]->{predicate} }
	268	sub has_clearer { exists $_[0]->{clearer} }
	269	sub has_handles { exists $_[0]->{handles} }
	270
	271	sub has_default { exists $_[0]->{default} }
	272	sub has_type_constraint { exists $_[0]->{type_constraint} }
	273	sub has_trigger { exists $_[0]->{trigger} }
	274	sub has_builder { exists $_[0]->{builder} }
	275
d899d3e7	276	sub has_documentation { exists $_[0]->{documentation} }
d899d3e7	277
93540011	278	sub accessor_metaclass(){ 'Mouse::Meta::Method::Accessor' }
93540011	279
43165725	280	package
	281	Mouse::Meta::TypeConstraint;
	282
	283	sub name { $_[0]->{name} }
	284	sub parent { $_[0]->{parent} }
	285	sub message { $_[0]->{message} }
	286
	287	sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} }
	288
93540011	289	sub _compiled_type_coercion { $_[0]->{_compiled_type_coercion} }
df6dd016	290
93540011	291	sub has_coercion{ exists $_[0]->{_compiled_type_coercion} }
df6dd016	292
f790c46b	293
	294	sub compile_type_constraint{
	295	my($self) = @_;
	296
	297	# add parents first
	298	my @checks;
	299	for(my $parent = $self->{parent}; defined $parent; $parent = $parent->{parent}){
	300	if($parent->{hand_optimized_type_constraint}){
	301	unshift @checks, $parent->{hand_optimized_type_constraint};
	302	last; # a hand optimized constraint must include all the parents
	303	}
	304	elsif($parent->{constraint}){
	305	unshift @checks, $parent->{constraint};
	306	}
	307	}
	308
	309	# then add child
	310	if($self->{constraint}){
	311	push @checks, $self->{constraint};
	312	}
	313
	314	if($self->{type_constraints}){ # Union
	315	my @types = map{ $_->{compiled_type_constraint} } @{ $self->{type_constraints} };
	316	push @checks, sub{
	317	foreach my $c(@types){
	318	return 1 if $c->($_[0]);
	319	}
	320	return 0;
	321	};
	322	}
	323
	324	if(@checks == 0){
	325	$self->{compiled_type_constraint} = \&Mouse::Util::TypeConstraints::Any;
	326	}
	327	else{
	328	$self->{compiled_type_constraint} = sub{
	329	my(@args) = @_;
	330	local $_ = $args[0];
	331	foreach my $c(@checks){
	332	return undef if !$c->(@args);
	333	}
	334	return 1;
	335	};
	336	}
	337	return;
	338	}
	339
	340
	341
df6dd016	342	1;
df6dd016	343	__END__
ccb38d0b	344
	345	=head1 NAME
	346
	347	Mouse::PurePerl - A Mouse guts in pure Perl
	348
	349	=head1 VERSION
	350
6e168432	351	This document describes Mouse version 0.40_05
ccb38d0b	352
	353	=head1 SEE ALSO
	354
	355	L<Mouse::XS>
	356
	357	=cut